1 files changed, 138 insertions, 32 deletions

diff --git a/src/output_control.c b/src/output_control.c
index 16c0dbb75..17edc3d72 100644
--- a/src/output_control.c
+++ b/src/output_control.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * Copyright (C) 2003-2010 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -17,12 +17,15 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
+#include "config.h"
 #include "output_control.h"
 #include "output_api.h"
 #include "output_internal.h"
 #include "output_thread.h"
 #include "mixer_control.h"
 #include "mixer_plugin.h"
+#include "filter_plugin.h"
+#include "notify.h"
 
 #include <assert.h>
 #include <stdlib.h>
@@ -38,8 +41,9 @@ struct notify audio_output_client_notify;
 static void ao_command_wait(struct audio_output *ao)
 {
 	while (ao->command != AO_COMMAND_NONE) {
-		notify_signal(&ao->notify);
+		g_mutex_unlock(ao->mutex);
 		notify_wait(&audio_output_client_notify);
+		g_mutex_lock(ao->mutex);
 	}
 }
 
@@ -47,6 +51,7 @@ static void ao_command(struct audio_output *ao, enum audio_output_command cmd)
 {
 	assert(ao->command == AO_COMMAND_NONE);
 	ao->command = cmd;
+	g_cond_signal(ao->cond);
 	ao_command_wait(ao);
 }
 
@@ -55,7 +60,46 @@ static void ao_command_async(struct audio_output *ao,
 {
 	assert(ao->command == AO_COMMAND_NONE);
 	ao->command = cmd;
-	notify_signal(&ao->notify);
+	g_cond_signal(ao->cond);
+}
+
+void
+audio_output_enable(struct audio_output *ao)
+{
+	if (ao->thread == NULL) {
+		if (ao->plugin->enable == NULL) {
+			/* don't bother to start the thread now if the
+			   device doesn't even have a enable() method;
+			   just assign the variable and we're done */
+			ao->really_enabled = true;
+			return;
+		}
+
+		audio_output_thread_start(ao);
+	}
+
+	g_mutex_lock(ao->mutex);
+	ao_command(ao, AO_COMMAND_ENABLE);
+	g_mutex_unlock(ao->mutex);
+}
+
+void
+audio_output_disable(struct audio_output *ao)
+{
+	if (ao->thread == NULL) {
+		if (ao->plugin->disable == NULL)
+			ao->really_enabled = false;
+		else
+			/* if there's no thread yet, the device cannot
+			   be enabled */
+			assert(!ao->really_enabled);
+
+		return;
+	}
+
+	g_mutex_lock(ao->mutex);
+	ao_command(ao, AO_COMMAND_DISABLE);
+	g_mutex_unlock(ao->mutex);
 }
 
 static bool
@@ -74,9 +118,13 @@ audio_output_open(struct audio_output *ao,
 
 	if (ao->open &&
 	    audio_format_equals(audio_format, &ao->in_audio_format)) {
-		assert(ao->pipe == mp);
+		assert(ao->pipe == mp ||
+		       (ao->always_on && ao->pause));
 
 		if (ao->pause) {
+			ao->chunk = NULL;
+			ao->pipe = mp;
+
 			/* unpause with the CANCEL command; this is a
 			   hack, but suits well for forcing the thread
 			   to leave the ao_pause() thread, and we need
@@ -85,6 +133,10 @@ audio_output_open(struct audio_output *ao,
 			/* we're not using audio_output_cancel() here,
 			   because that function is asynchronous */
 			ao_command(ao, AO_COMMAND_CANCEL);
+
+			/* the audio output is now waiting for a
+			   signal; wake it up immediately */
+			g_cond_signal(ao->cond);
 		}
 
 		return true;
@@ -93,33 +145,47 @@ audio_output_open(struct audio_output *ao,
 	ao->in_audio_format = *audio_format;
 	ao->chunk = NULL;
 
-	if (!ao->config_audio_format) {
-		if (ao->open)
-			audio_output_close(ao);
-
-		/* no audio format is configured: copy in->out, let
-		   the output's open() method determine the effective
-		   out_audio_format */
-		ao->out_audio_format = ao->in_audio_format;
-	}
-
 	ao->pipe = mp;
 
 	if (ao->thread == NULL)
 		audio_output_thread_start(ao);
 
+	ao_command(ao, ao->open ? AO_COMMAND_REOPEN : AO_COMMAND_OPEN);
 	open = ao->open;
-	if (!open) {
-		ao_command(ao, AO_COMMAND_OPEN);
-		open = ao->open;
-	}
 
-	if (open && ao->mixer != NULL)
-		mixer_open(ao->mixer);
+	if (open && ao->mixer != NULL) {
+		GError *error = NULL;
+
+		if (!mixer_open(ao->mixer, &error)) {
+			g_warning("Failed to open mixer for '%s': %s",
+				  ao->name, error->message);
+			g_error_free(error);
+		}
+	}
 
 	return open;
 }
 
+/**
+ * Same as audio_output_close(), but expects the lock to be held by
+ * the caller.
+ */
+static void
+audio_output_close_locked(struct audio_output *ao)
+{
+	if (ao->mixer != NULL)
+		mixer_auto_close(ao->mixer);
+
+	assert(!ao->open || ao->fail_timer == NULL);
+
+	if (ao->open)
+		ao_command(ao, AO_COMMAND_CLOSE);
+	else if (ao->fail_timer != NULL) {
+		g_timer_destroy(ao->fail_timer);
+		ao->fail_timer = NULL;
+	}
+}
+
 bool
 audio_output_update(struct audio_output *ao,
 		    const struct audio_format *audio_format,
@@ -127,23 +193,31 @@ audio_output_update(struct audio_output *ao,
 {
 	assert(mp != NULL);
 
-	if (ao->enabled) {
+	g_mutex_lock(ao->mutex);
+
+	if (ao->enabled && ao->really_enabled) {
 		if (ao->fail_timer == NULL ||
-		    g_timer_elapsed(ao->fail_timer, NULL) > REOPEN_AFTER)
-			return audio_output_open(ao, audio_format, mp);
+		    g_timer_elapsed(ao->fail_timer, NULL) > REOPEN_AFTER) {
+			bool success = audio_output_open(ao, audio_format, mp);
+			g_mutex_unlock(ao->mutex);
+			return success;
+		}
 	} else if (audio_output_is_open(ao))
-		audio_output_close(ao);
+		audio_output_close_locked(ao);
 
+	g_mutex_unlock(ao->mutex);
 	return false;
 }
 
 void
 audio_output_play(struct audio_output *ao)
 {
-	if (!ao->open)
-		return;
+	g_mutex_lock(ao->mutex);
 
-	notify_signal(&ao->notify);
+	if (audio_output_is_open(ao))
+		g_cond_signal(ao->cond);
+
+	g_mutex_unlock(ao->mutex);
 }
 
 void audio_output_pause(struct audio_output *ao)
@@ -154,27 +228,55 @@ void audio_output_pause(struct audio_output *ao)
 		   mixer_auto_close()) */
 		mixer_auto_close(ao->mixer);
 
-	ao_command_async(ao, AO_COMMAND_PAUSE);
+	g_mutex_lock(ao->mutex);
+	if (audio_output_is_open(ao))
+		ao_command_async(ao, AO_COMMAND_PAUSE);
+	g_mutex_unlock(ao->mutex);
+}
+
+void
+audio_output_drain_async(struct audio_output *ao)
+{
+	g_mutex_lock(ao->mutex);
+	if (audio_output_is_open(ao))
+		ao_command_async(ao, AO_COMMAND_DRAIN);
+	g_mutex_unlock(ao->mutex);
 }
 
 void audio_output_cancel(struct audio_output *ao)
 {
-	ao_command_async(ao, AO_COMMAND_CANCEL);
+	g_mutex_lock(ao->mutex);
+	if (audio_output_is_open(ao))
+		ao_command_async(ao, AO_COMMAND_CANCEL);
+	g_mutex_unlock(ao->mutex);
 }
 
 void audio_output_close(struct audio_output *ao)
 {
-	assert(!ao->open || ao->fail_timer == NULL);
-
 	if (ao->mixer != NULL)
 		mixer_auto_close(ao->mixer);
 
+	g_mutex_lock(ao->mutex);
+
+	assert(!ao->open || ao->fail_timer == NULL);
+
 	if (ao->open)
 		ao_command(ao, AO_COMMAND_CLOSE);
 	else if (ao->fail_timer != NULL) {
 		g_timer_destroy(ao->fail_timer);
 		ao->fail_timer = NULL;
 	}
+
+	g_mutex_unlock(ao->mutex);
+}
+
+void
+audio_output_release(struct audio_output *ao)
+{
+	if (ao->always_on)
+		audio_output_pause(ao);
+	else
+		audio_output_close(ao);
 }
 
 void audio_output_finish(struct audio_output *ao)
@@ -184,7 +286,9 @@ void audio_output_finish(struct audio_output *ao)
 	assert(ao->fail_timer == NULL);
 
 	if (ao->thread != NULL) {
+		g_mutex_lock(ao->mutex);
 		ao_command(ao, AO_COMMAND_KILL);
+		g_mutex_unlock(ao->mutex);
 		g_thread_join(ao->thread);
 	}
 
@@ -193,6 +297,8 @@ void audio_output_finish(struct audio_output *ao)
 
 	ao_plugin_finish(ao->plugin, ao->data);
 
-	notify_deinit(&ao->notify);
+	g_cond_free(ao->cond);
 	g_mutex_free(ao->mutex);
+
+	filter_free(ao->filter);
 }